California Specific PG Exam Questions with 100% Correct Answers

Anorthosite Correct Answer a plutonic igneous rock composed almost entirely of plagioclase feldspar, found in the San Gabriel Mountains and dated about 1.022 billion years Connate Water Correct Answer Water trapped in a formation at the time of deposition Franciscan Formation Correct Answer a heterogeneous unit of sedimentary and volcanic rocks consisting of graywakce and inter-bedded shale, minor amounts of chert, limestone, greenstone, andd metamorphic rocks of greenschist and blueschist facies. May be 50,000 ft thick. Franciscan Formation Correct Answer Basement rock in Coast Ranges Lake Cocoran Correct Answer Freshwater lake that covered much of the western San Joaquin Valley about 600,000 years ago. Freshwater deposits include lake clays, volcanic ash, and diatomite of Corcoran Clay member of Tulare formation Los Angeles Basin Correct Answer A large downwarped basin formed in Late Tertiary that received thousands of feet of marine sediments. The basin produced petroleum in prolific quantities. Ma Correct Answer millions of years Monterey Formation Correct Answer A widespread Mioceene marine formation consisting of siliceous shales and cherts. Silica was deposited as diatomites and silicic ash beds. Phosphates were also deposited in the formation. Overdraft Correct Answer The condition of water withdrawal by pumping exceeding the amount of water recharged, occurring over a time frame longer than a year. Pelona Schist Correct Answer Low-grade metamorphic rock of Cretaceous age in Transverse Ranges Monterey Formation Correct Answer Most likely source of much of the petroleum and natural gas in the Transverse Ranges Province. Salinian Block Correct Answer The structural block located west of the San Andreas Fault zone and east of the Ncimiento Fault Zone. The basement is composed of Late Cretaceous granitic rocks. The other main basement type in the Coast Ranges Province San Andreas Fault Correct Answer Northwest-trending, right-lateral, strike slip fault, 750+ feet long. Separates Pacific and North American plates.